Tube joint



FIG. 1 shows a front view of a tube joint showing my new design;

FIG. 2 shows a top view thereof;

FIG. 3 shows a bottom view thereof;

FIG. 4 shows a right side view thereof;

FIG. 5 shows a left side view thereof; and,

FIG. 6 shows a plan view thereof.

The broken line showing is for illustrative purposes only and forms nopart of the claimed design.

The ornamental design for a tube joint, as shown and described.